0 A.D. is a free, open-source, cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of twelve ancient civilizations, from Iberia to Mauryan India, each depicted at their peak of economic growth and military prowess. Developed using Pyrogenesis, a ground-breaking new game engine custom-built to suit this project, 0 A.D. will give players a rich and entertaining real-time gaming experience.

This is in fact modeled after the Temple of Vesta, which sat at the South corner of the Roman Forum. It is known that the Vestal Virgins kept the fire burning inside this temple continuously, and it represented the beating heart of Rome.

Wikipedia:

"The sacred fire of Vesta was a holy fire in Ancient Rome. The Vestal Virgins, originally numbering two, later four and eventually six, were selected by lot and served for thirty years, tending the holy fire and performing other rituals connected to domestic life—among them were the ritual sweeping of the temple on June 15 and the preparation of foods for certain festivals. By analogy, they also tended the life and soul of the city and of the body politic through the sacred fire of Vesta, which was renewed every year on the Kalends of March.

The sacred fire burned in Vesta's circular temple, built in the Roman Forum below the Aventine Hill in pre-republican times. Among other sacred objects in the temple was the Palladium, a statue of Pallas Athena supposedly brought by Aeneas from Troy. The temple burned completely on at least four occasions and caught fire on two others. It was last rebuilt in 191 AD on the orders of Julia Domna, the wife of the emperor Septimius Severus, The rites of Vesta ended in 394 by order of Theodosius I. The fire was extinguished and the College of Vestal Virgins disbanded."